Drilling machine



D. IBLAER DRILLING MACHINE Filed Oct. 6, 1923 flu Elwin" Wessex PatentedNov. 16, 1924!.

warren stares P Hill DINK BLAIR, OF DENISON, TEXAS.

DRILLING MACHINE.

.Application filed: October 6, 1923. Serial]. .No. 666,994.

useful improvements in drilling ,inachines -machinespecifically adaptedfor 'sdlillillg andQhas-i'particular reference to 1 a drilling inrestricted :placeasuch asdrilling holes n the sills :-of--railway-carspreparatory to splicing the same.

[The primary object of the invention isto provide a drilling ,Inachilnecapable of use in restricted places and embracing the desired qualitiesofv simplicity, efficiency and durability of construction.

Another object of the invention is to provide a, drilling machineembodying a simple and durable frame supporting the drill and drivingmechanism and provided with means for adjustably regulating the heightat which the drill is supported above the ground or floor, the drivingmechanism em bodying means at a remote point from the drill forfacilitating application of power thereto. I

Other objects will appear as the nature of the invention is betterunderstood, and the same consists in the novel form, combination, andarrangement of parts, hereinafter more fully described, shown in theaccompanying drawing, and claimed' In the drawing, wherein likereference characters designate corresponding parts in the two views:

Figure 1 is a side elevational view of a drilling machine constructed inaccordance with the present invention, and

Figure 2 is an enlarged horizontal sectional view, taken substantiallyupon the line 2-2 of Figure 1.

Referring more in detail to the drawing, the present invention embodiesa rigid open elongated frame, suitably constructed of metal andembodying relatively long front,

back, top and bottom frame members, 5, 6, 7, and 8 respectively, thefront and back frame members 5 and 6 being relatively long, and theupper portion of the frame being relatively narrower than the lowerportion thereof, by inwardly offsetting the intermediate portion of theback frame member 6 as at 9, and forming the top wall 7 shorter.downturned andrivetedi-n the inner es than the bottom wall or.framemeinheiyfi as shown clearly inFigurel.

The front andback framemembersh and 6 arerigidly connected at suitableintervals by a plurality of horizontal connecting braces 10; 11 and 12,the first twofniehtioned ones of which connectthefrontand back framemembers at the uppernarroav portion of tl16;,S& 11 16,-E1I1(lfl16relating b, 1:2 being r nge t connec the frag e hers 5 and (Set thelower wider p thereof. The-ends of thebracesl-l ina. be

of the frame members 5 an'd 6;as sh" and avertitralv longitudinal.jshaftilgf ranged between the frame members-,5; 11

v6 and journalled in the bracesfltl, 11 Land 12. The upper end of theshaft 13 1)rojects above the upper brace 10 andhas a bevelled gear 1&fixed thereon, in mesh withanother bevelledgear 15 that isfixed upon atransverse shaft 16 journalled in the frame members 5 and 6 and suitablyadapted for reception of a metal drill 17 that projects forwardly fromthe front frame member 5. The shaft 13 projects through the lower brace12 and has a further bevelled gear 18 secured on the lower end and heldin mesh with a relatively larger bevelled gear 19 fixed upon atransverse drive shaft 20 that is journalled in the frame members 5 and6 in a horizontal position, and also in a vertical brace member 21 thatconnects the brace 12 with the bottom frame member 8 rearwardly of thegear 19. lhe rear end of the shaft 20 projects through the frame member6 and is adapted at its projecting rear end for reception of a pulley,gear or handle by means of which power may be applied thereto. A handleis shown applied to the projecting end of the shaft 20 as at 22, bymeans of a set screw 23 carried by said handle and threaded through onewall of the socket of said handle into which the ends of the shaft .40is fitted.

In order to permit steadying of the device when operatively disposed ina vertical position as shown in Figure 1, the upper portion of the rearframe member 6 may be provided with a handle as at 24. The lower portionof the front frame member 5 is provided with forwardly projectingflanges 25, the free edge portions of which are inturned as at 26, forforming guides in which is longitudinally slidable a rack bar 27, thatis disposed parallel with the frame member being provided upon the innerface'of the rack bar 27 in position to be engaged by the teeth. of apinion 28 suitably journalled in ears 29 projecting from the rear sideof the frame member 5 at opposite sides of the slot 30 in the latterthrough which the pinion 28 projects. The shaft of the pinion 28 isprovided with a suitable hand crank 31 whereby the same may be manuallyrotated, and the lower end of the rack bar 27 is provided with a rigidfoot 32 adapted to engage the floor or ground.

In operation, the foot 32 is placed into engagement with the floor orground and v the handle 31 is rotated, so as to cause vertical movementof the frame and parts carried thereby in side elevation. Any suitablemeans may be provided for locking the pinion 28 against turning when thesame has been adjusted to the desired height. When this takes place, itis of course to be understood, that the frame is to be posi tionedsubstantially in a vertical position as shown in Figure 1, so that thenarrow upper portion of the frame may be readily positioned inconstricted places for utilizing the drill which is rotated through thegearing described, by supplying power in a suitable manner to the shaft20, the device being started by the operator grasping in one hand thehandle 24.

From the foregoing description it is believed that the construction andoperation as well as the advantages of the invention will be readilyunderstood and appreciated by those skilled in the art.

Minor changes may be made without dcparting from the spirit and scope ofthe invention as claimed.

What I claim as new is:

A drill comprising an elongated frame narrower at one end than at theother, said frame being pointed at its narrower end and at the side edgethereof, a transverse drill carrying shaft journalled in the frame atthe narrower end thereof, means carried by the frame and disposedlongitudinally thereof for rotating the drill carrying shaft, said framebeing provided at its larger end portion and the same side edge at whichthe point is located with guide flanges, a rack bar longitudinallyslidable in said guide flanges and disposed in alignment with thepointed end of the frame, and a pinion journalled upon the frame andengaging the teeth of the rack bar.

In testimony whereof I afiix my signature.

DINK BLAIR.

